tsk7.java

package some;

public class tsk7 {

 @FunctionalInterface interface F<T, R> { R a(T a); }

 static <T> T prt(T a, F<T, String> d, String b) {
 System.out.println("" +
 (d != null ? d.a(a) : a) +
 (b != null ? b : ""));
 return a;
 }

 ////////////////////////////////////////

 @SuppressWarnings("StatementWithEmptyBody")
 public static void main(String[] args) {
 for (var i = 0; i <= _a; i++,
 prt(FlWgPrFct.a((int) (Math.random() * 9)).a(), null, null) );

 prt(((Any) new Prx(new Rl(5), a -> a * 1000)).a(), null, null);
 }

 ////////////////////////////////////////

 final static int _a = 9;

 interface IFlWgPr { int a(); }

 static record FlWgPr(int a) implements IFlWgPr
 { @Override public int a() { return a; } }

 static class FlWgPrFct {
 private static final IFlWgPr[] a = new IFlWgPr[_a];
 private FlWgPrFct() {}

 static IFlWgPr a(int c) { return
 a[c] == null ?
 a[c] = prt(new FlWgPr(c), b -> "" + b.a(), " created") :
 a[c]; }
 }

 ////////////////////////////////////////

 interface Any { int a(); }

 static record Rl(int b) implements Any
 { @Override public int a() { return b; } }

 static record Prx(Any a_, F<Integer, Integer> c) implements Any
 { @Override public int a() { return c.a(a_.a()); } }
}